Assighos



R. H. IE FFREY. MINING MACHINE.

APPLICATION FILED MAY I. I9I4. RENEWED DEC. 28. I9I8.

Patented Aug. 26, I919.

ROBERT H. JEFFREY, OF COLUMBUS, OHIO, ASSIGNOR TO THE JEFFREY MAHUFACTUR- ING- COMPANY, OF COLUMBUS, OHIO, A. QQBPORATIGN' OF OHIG.

Mmms-tmonmn Application filed m 1, 1914, Serial No. 835,758.

To all whom it may concern:

Be it known that 1, ROBERT H. JEFFREY, a citizen of the United States, residing at C0-- lumbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in h iiningMachines, of which the following-is a specification, reference being had therein to the accompanying drawing. 1

The invention relates more especially to mining'machines of the side cutting type, and has for its object to effect the horizontal cutting of the coal primarily by multiple,

' )arallel keri cutters which may produce not only narrow ker'fs in the body. of the coal,

but keri's of relatively great horizontal extent, whereby comparatively little of the coal in proportion to the extent of the cut may be wasted in the process; also to provide various imp ivements in the 1 mechanismwhereby it is rendered more simple, convenient and effective for the purpose.

In order to make the invention more clearly understood there are shown in the accompanying drawings means for carrying the same into practical effect, without limiting the improvements, in their useful applications, to the particular construction which, for the purpose of explanatiomhas been delineated; and with the understanding that the invention may be embodied in other forms of construction. In the said drawings- Figure 1 is a plan View of a mining machine embodying the invention, the front or inner'portion of the same being shown in dotted lines.

Fig. 2 is a side elevation of the same, showing the coal face in vertical section nd the cutters entered therein to nearly the full extent. r v

Referring to the drawings, 1 is the bottom plate of the bed frame, the latter having also flanged side plates 2 and a top plate 3, all of which are connected. to form a, rigid structure. The top plate 3 is preferably in the form of a casting upon which the cutter. frame is mounted. The cutter frame is comosed of top and bottom side plates 6 and i with interposed vertical plates, the whole being united by rivets into a rigid structure. In thisstructure are comprised upper and lower end plates 11 and 12, by which the side plates 6, '4 are united at their front ends. At their rear ends they are attached Specification of Letters Eatent.

Renewed December as, rare. Serial No. seam-e.

rat-elites Aug. so, was.

to the bed frame. The plates 6, 7 and 11, i2 I "are arranged to leave bi-tween them at their outer sides guide spaces for the cutter and drive chain 10. The-latter may be of any suitable construction to operate the bits or cutterslO, and to drive the multiple lie-rt cutters as hereinafter described.

At the outer end of the cutter frame the cutter chain passes over a sprocket wheel 14 which is loosely mounted on a fixed vertical shaft-on the rear or outer part of the bed frame.

The machine is or may be propelled along the face of the coal during the cutting operation by a cable or the like, and upon the inner end of the'bed frame is mounted a winding drum 1.8. A suitable draft'cable 19 has one end secured to the winding drum so that it can be wound upon the drum when the latter is turned. The cable 19 passes downward from the drum and under a guide sheave or pulley 17 mounted in a caster rotatably mounted in the top plate of the bed frame. The'arra'ngement is such that the cable 19 passes downward through said spindle and under the pulley. The cable can be taken oil" in any desired direction within a range of about 180, either toward the face of the coalwhen the machine is to he lied in- Ward at the right rib to make the suniping' .block or frame 16 having a.tubular spindle ture shaft 28 arranged longitudinally of l the machine to drive the drum l8 and the chain 10. The shaft 28 carries'at its inner end a bevel pinion 29 which meshes with a bevel gear 30 fixed on the vertical shaft 3]. The lower end of this shaft is mounted in a hearing 32 attached to the bed frame- The carried by a yoke 34 mounted on the bed fwd,

- upper end oi. the shaft turns in a bearin 33,

frame. '35 is a worm fixed on t; e shaft 31 and meshing with a worm Wheel 36 fixed This shaft 18 on a longitudinal shaft 32.

' on the top'plate of the bed frame. A ball bearing 39 may be applied between the gear 30 and. its bearing 83 to take the end thrust of the worm. 41 is a pinion loose on the shaft 37, and on the inner end of the shaft is loosely mounted a sleeve 42, which turns in the bearing 38. 42 is a pinion fixed on the inner end of the sleeve 42, and 43 is a large spur gear fixed on its outer end. The gear 43 has an outer clutch face or extension 44 and the pinion 41 has an inner clntclf'member 45. /46 is a double clutch member slidably keyed on the shaft'37 and engageable at will with either of'the clutch elements 44 or 45 by means of a shifting hand lever 49 and suitable connections.

The pinion 41 meshes with a gear wheel 50 which is fixed on the outer end of a short shaft 51 turnable in a bearing 52 on the bed frame. 53 is a pinion secured on the inner end of the shaft 51 and meshing with the gear wheel 43. The pinion42 meshes with a large gear 54 fixed on the drum 18, or on its shaft. 55 is the ball thrust bearing in terposed between the pinion 41 and the outerbearing 39 to take the end thrust of the shaft 37. The gearing is preferably inclosed by a casing 68;

By the gearing described the drum 18 can be driven at either of two speeds from the motor and shaft 31. Thus, if the clutch member 46 is thrown so as to make the pinion 41 fast on the shaft 37 the latterwillturn the shaft 51 through the gear 50 and the drum 18 through the pinion 53, gear 43, sleeve 42, pinion 42 and gear 54, and at a lower speed. If the clutch be caused to connect the shaft 37 directly with the gear 43 the drum 18 will be turned in the same direction as before, but at a higher speed, through the sleeve 42 and its said driven connections, the pinion 53, gear 50 and pinion 41 turniug'idly.

The cutter chain wheel 14 is conneotible at will by a clutch device 59 with a gear 57 on its shaft, and this gear is driven by a pinion 56 fixed on the lower end of the motor-driven. shaft To retard the outer end of the machine as against the pull of the cable 19 and Keep it directed at the desired angle to thecoal face, an unwinding dru1n73 and cable 74 are provided. The outer end of the cablc is suitably anchored at, the right rib and the drum is yieldably held as it unwinds by an adjustable friction brake band or device chain'or under cutter.

76 is a rotary cutter shaft extended upward from the chain cutter. It is or may be substantially vertical. Its lower end passes through a bearing 77 fixed on the cutter frame plate 11 and attached to said wheel 78. arranged between the plates 11 is carried by bracket arms 80 attached to the cutter frame plates 6.

81 indicates a kerf'cutter or narrow saw, a plurality or series of which, parallel with each other, are fixed or clamped on the shaft 76, as by spacing sleeve elements 82, washers 85 and one or more nuts 83. The shaft may be extended above the bearing 79 and carry one or more cutters 81 above such bearing. a

It is not necessary that the chain cutting mechanism 10, 10, make a complete undercut as deep as the kerfs, provided it make sufficient cut, as may be necessary, for the introduction of the icutter shaft driving wheel 78, or other driving means, partly within the coal 'face, so that the cutters 81 may enter up to their hubs and make as deep a cut and advance into and along the coal face as possible. By an arrange. ment, such as is illustrated (Fig. 2), the kerf cutters may cut and enter and thereafter be fed considerably in advance of the It results from this that in the sumping cut the kerf cutters or saws may or do enter the coal face for one half or more of their total depth of cut before the chain or under cutter begins to act, except as a driving element for the kerf cutters; and during the subsequent kerfforming operation across the face of the coal the chain or under cutter operates on, cuts and removes much less coal than it would-if it entered to the same depth as the kerf cutters. The machine conseqently requires much less power both in sumping and in kerf cutting, and can be fed at materially greater speed.

During the sumping cut the guidin of the machine may be aided by a gui ing means'86. attached to the floor as set forth in said Merrill patent; As the side out nears completion the brake device 75 is tightened, causing the cutters to be swung more to the left to cut into the corner.

The bearing 77 may act as a guide/by its contact with the coal face, during the movemerlit of the machine across the face of the coa What I claim is:

1. In a mining machine, the combination ofnarrow kerf cutters arranged parallel and 70 lower end is a drivingmeans such as a chain of ke-rf cutting saws arranged parallel and in multiple, a chain cutter arranged as an under cutter below said saws and a shaft carrying all of said cutters whereby the said chain cutter rotates the said saws; substantially as set forth.

3. in a mining machine, the combination of kerf cutters arranged parallel and in multiple, a chain cutter arranged as an under-cutter below said kerf cutters, a shaft carrying all of said-cutters whereby the said chain cutter drives the said kerf cutters, and means for feeding the kerf cutters and chain cutter together bodily across the. face of the coal; substantially as set forth.

4:. In a mining machine, the combination of kerf cutting saws arranged parallel and in multiple, a chain cutter arranged an under cutter below said saws, a shaft carrying all of said cutters whereby the said chain cutter rotates the saws, and means for feeding the saws and the chain cutter together bodily across the face of the coal; substantially as set forth.

5. In a mining machine, the combination of narrow kerf cutters arranged parallel and in multiple, and an undercutte-r arranged to cut a thick or wide kerf below the narrow kerfs; said multiple kerf cutters being extended forward of said under-cutter arid adapted to'cut into the coal beyond the cut of the latter; substantially as set forth.

6. in a mining machine, the combination of a bed frame, a chain cutter frame carried thereby, a vertical shaft mounted at its bottom end on said cutter frame, kerf cutters fixed on the upper part of said shaft, an

under cutting chain mounted at its forward part on the bottom end of said shaft to drive the same, and means for feeding the bed frame laterally across the face of the coal.

7. In a mining machine, the combination of a bed frame, a chain cutter carried at the inner end of the same, narrow kerf cutting saws arranged horizontally in multiple above the chain cutter and adapted to cut into the coal beyond the cut ofthe chain cutter, and means for actuating the said cutter and saws; substantially as set forth.

8. In a mining machine, the combination of a bed frame, a motor thereon, a chain cutter frame fixed to and extending from the inner end of the bed frame, a vertical shaft mounted kbOVQ the chain cutter frame, horizontal narrow kerf cutters arranged parallel and in multiple on the said vertical shaft, a chain cutter on the said cutter frame, means whereby the chain cutter rotates the said shaft, and driving mechanism connecting the motor with the chain cutter; substantially as set forth.

9. In a mining machine, the combination of a bed frame, a cutter frame attached to the inner end of the bed frame, a chain cutter mounted and operating on the said outter frame, a lower bearing supported on the cutter frame, an upper bearing having means whereby it is supported at a distance above the cutter frame, a vertical shaft mounted in the said bearings, narrow kerf cutting saws fixed on the said shaft, means whereby the chain cutter actuates the said shaft, and means for feeding the bed frame across the face of the coal; substantially as set forth.

in testimony whereof, I affix my signa ture, in presence of two witnesses.

RGBERT H. JEFFREY.

Witnesses:

Dunner T. FISHER, P I HENRY. 

